Oil bearing and air blower for vehicle-mounted air conditioner

Abstract

The invention relates to the field of bearings, in particular to an oil bearing and an air blower for a vehicle-mounted air conditioner. Wherein the oil-retaining bearing comprises a bearing inner hole into which a shaft is inserted; the bearing inner hole is provided with a plurality of oil grooves, first contact faces and second contact faces, one first contact face is arranged between any two adjacent oil grooves in the circumferential direction of the bearing inner hole, and all the first contact faces intersect with the second contact faces in the axial direction of the bearing inner hole. All the first contact surfaces and the second contact surfaces are coplanar with the same reference cylindrical surface, and any oil groove is sunken in the reference cylindrical surface in the radial direction of the bearing inner hole. According to the oil bearing provided by the invention, the second contact surface is additionally arranged, and the second contact surface and the first contact surface are coplanar, so that the technical problem of how to reduce the rotating pair impact noise formed during the operation of the oil groove recess and the armature shaft microcosmic bulge of the oil bearing in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the field of bearings, in particular to an oil-containing bearing and a blower for a vehicle air conditioner. Background Art

[0002] In the prior art, there is provided a patent document entitled "An Oil-Containing Bearing" with an application number of 201620077458.1; in the patent document, the oil-containing bearing is provided with a plurality of first areas for bearing loads and a plurality of second areas for containing lubricating oil (the second areas are actually oil grooves, which are in a concave state and are often referred to as oil groove depressions by those skilled in the art). By providing the second areas, it is possible to ensure that the pores at 1 / 4 to 1 / 3 of the inner hole of the oil-containing bearing are not blocked, thereby increasing the oil outlet speed and reducing the occurrence of slow oil outlet failures of the oil-containing bearing.

[0003] In the above-mentioned prior art, the first area protrudes toward the cavity of the inner hole, while the second area is recessed in the direction away from the cavity, and a first area is arranged between two adjacent second areas, which makes the inner surface of the cavity form an uneven structure along the circumferential direction; at the same time, when the armature shaft is inserted into the cavity of the oil-containing bearing of the above-mentioned prior art and the armature shaft rotates relative to the oil-containing bearing, the circumferential surface of the armature shaft has irregular protrusions D1 under the microscopic view (see Figures 4 to 6 ), referred to as micro-protrusions (it should be understood that the irregular protrusions D1 are actually micro-protrusions of the armature shaft), resulting in the irregular protrusions D1 colliding with the edge of the first zone during the process of rotating from the second zone to the first zone, so that the rotating pair formed by the above-mentioned prior art oil-containing bearing and the armature shaft has relatively large noise.

[0004] Therefore, how to reduce the impact noise of the rotating pair formed by the depression of the oil groove of the oil-containing bearing and the microscopic protrusion of the armature shaft during operation in the prior art becomes a technical problem to be solved. Summary of the invention

[0005] In order to solve the technical problem of how to reduce the impact noise of the rotating pair formed by the oil groove depression of the oil-containing bearing and the microscopic protrusion of the armature shaft during operation in the prior art, the present invention provides an oil-containing bearing and a blower for a vehicle air conditioner.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] According to one aspect of the present invention, there is provided an oil-containing bearing, comprising a bearing inner hole for inserting a shaft;

[0008] The inner hole of the bearing is provided with a plurality of oil grooves, a first contact surface and a second contact surface, wherein, along the circumferential direction of the inner hole of the bearing, there is one first contact surface between any two adjacent oil grooves, and along the axial direction of the inner hole of the bearing, all the first contact surfaces intersect with the second contact surfaces respectively;

[0009] All of the first contact surfaces and the second contact surfaces are coplanar with the same reference cylindrical surface, and along the radial direction of the inner hole of the bearing, any one of the oil grooves is recessed in the reference cylindrical surface.

[0010] Furthermore, the two ends of the inner hole of the bearing are a head end and a tail end respectively;

[0011] The plurality of oil grooves are configured to extend along the direction from the head end to the tail end, and the second contact surface is configured to extend along the direction from the tail end to the head end;

[0012] Furthermore, the number of the oil tanks is N, wherein N is an odd number greater than 3.

[0013] Furthermore, the second contact surface is in a circular ring shape.

[0014] Furthermore, along the axial direction of the inner hole of the bearing, the length of the second contact surface is limited to a length between one quarter and one half of the length of the inner hole of the bearing.

[0015] According to one aspect of the present invention, there is provided a blower for a vehicle air conditioner, comprising the aforementioned oil-containing bearing.

[0016] The above technical solution has the following advantages or beneficial effects:

[0017] The oil-containing bearing provided by the present invention solves the technical problem of how to reduce the impact noise of the rotating pair formed by the oil groove depression and the microscopic protrusion of the armature shaft during operation in the prior art by adding a second contact surface, and the second contact surface is coplanar with the first contact surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of an oil-containing bearing provided in Example 1 of the present invention;

[0019] Figure 2 A cross-sectional view of an oil-containing bearing provided in Example 1 of the present invention;

[0020] Figure 3 A curve diagram of the vibration acceleration of the oil-containing bearing provided in Example 1 of the present invention;

[0021] Figure 4 is a schematic diagram of the microstructure of the armature shaft;

[0022] Figure 5 is a schematic diagram of the microstructure of the armature shaft;

[0023] Figure 6 It is a schematic diagram of the combined structure of the microstructure of the armature shaft and the oil groove of the oil-containing bearing of the present invention;

[0024] Figure numerals: 1, bearing inner hole, 2, oil groove, 3, first contact surface, 4, second contact surface. DETAILED DESCRIPTION

[0025] Embodiment 1:

[0026] In this embodiment, an oil-containing bearing is provided to solve the technical problem of how to reduce the impact noise of the rotating pair formed by the oil groove depression and the armature shaft micro-protrusion during operation in the prior art oil-containing bearing.

[0027] For details, see Figure 1 and Figure 2 The oil-containing bearing of this embodiment includes a bearing inner hole 1 for inserting a shaft;

[0028] The inner hole 1 of the bearing is provided with a plurality of oil grooves 2, a first contact surface 3 and a second contact surface 4, wherein, along the circumferential direction of the inner hole 1 of the bearing, there is a first contact surface 3 between any two adjacent oil grooves 2, and along the axial direction of the inner hole 1 of the bearing, all the first contact surfaces 3 intersect with the second contact surfaces 4 respectively;

[0029] All the first contact surfaces 3 and the second contact surfaces 4 are coplanar with the same reference cylindrical surface, and along the radial direction of the bearing inner hole 1, any oil groove 2 is recessed in the reference cylindrical surface.

[0030] It is common knowledge known to those skilled in the art that oil-containing bearings have a relatively large number of pores.

[0031] A conventional oil-containing bearing (an oil-containing bearing without an oil groove 2) uses a shaping mandrel to process its bearing inner hole 1. The shaping mandrel can destroy the raised particles on the surface of the bearing inner hole 1 of the conventional bearing, causing the raised particles to be squeezed and deformed. The squeezed and deformed relatively large particles block some pores, resulting in a low pore oil discharge rate of the conventional oil-containing bearing.

[0032] In the oil-containing bearing of this embodiment, the multiple oil grooves 2 are used to increase the oil flow rate from the pores to the inner hole of the oil-containing bearing.

[0033] Specifically, when the oil-containing bearing blank is manufactured by powder metallurgy, the oil-containing bearing blank having a plurality of oil grooves 2 is directly manufactured. Along the radial direction of the bearing inner hole 1 of the oil-containing bearing blank, the oil grooves 2 are configured to be recessed toward the outer surface of the oil-containing bearing (see Figure 1 or Figure 6 ), correspondingly, along the radial direction of the bearing inner hole 1 of the oil-containing bearing blank, the first contact surface 3 located between any two oil grooves 2 is configured to protrude in the direction of the axis of the oil-containing bearing; at the same time, the second contact surface 4 is configured to be located on the same reference cylindrical surface as the first contact surface 3.

[0034] The reference cylindrical surface is a virtual reference object used to describe the positional relationship between the first contact surface 3 and the second contact surface 4; from a macroscopic perspective, the first contact surface 3 and the second contact surface 4 coincide with the reference cylindrical surface respectively, or the first contact surface 3 and the second contact surface 4 are respectively part of the reference cylindrical surface.

[0035] In the oil-containing bearing of this embodiment, the second contact surface 4 is annular. If the armature shaft is inserted into the bearing inner hole 1 of the oil-containing bearing blank, any first contact surface 3 forms a surface-to-surface contact with the circumferential surface of the armature shaft, and the second contact surface 4 forms a surface-to-surface contact with the circumferential surface of the armature shaft.

[0036] After obtaining the oil-containing bearing blank, a shaping mandrel is used to shape the bearing inner hole 1 of the oil-containing bearing blank, wherein the specific shaping objects of the shaping mandrel are the first contact surface 3 and the second contact surface 4. Conversely, the surfaces of the multiple oil grooves 2 are not the shaping objects of the shaping mandrel.

[0037] It is because the surface of the oil groove 2 is not shaped by the shaping mandrel, so that, from a microscopic perspective, the raised particles on the surface of the oil groove 2 will not be squeezed and deformed by the shaping mandrel, and obviously, the pores on the surface of the oil groove 2 will not be blocked.

[0038] After the shaping mandrel has finished shaping the first contact surface 3 and the second contact surface 4 of the oil-containing bearing blank, the oil-containing bearing of this embodiment is obtained.

[0039] The area of ​​the oil-containing bearing of the present embodiment that is shaped by the shaping mandrel is the sum of the area of ​​the first contact surface 3 and the area of ​​the second contact surface 4, while in the aforementioned conventional oil-containing bearing, the area that is shaped by the shaping mandrel is the area of ​​its bearing inner hole 1. Under the condition that the diameter of the bearing inner hole 1 of the oil-containing bearing of the present embodiment is the same as the diameter of the bearing inner hole 1 of the conventional oil-containing bearing, and the axial length of the bearing inner hole 1 of the oil-containing bearing of the present embodiment is the same as the bearing length of the bearing inner hole 1 of the conventional oil-containing bearing, the area of ​​the oil-containing bearing of the present embodiment that is shaped by the shaping mandrel is smaller than the area of ​​the conventional oil-containing bearing that is shaped by the shaping mandrel, resulting in the number of pores that are blocked in the oil-containing bearing of the present embodiment being smaller than the number of pores that are blocked in the conventional oil-containing bearing. To put it another way, it is precisely because the oil-containing bearing of the present embodiment includes a plurality of oil grooves 2 that are not shaped by the shaping mandrel that the pores of the plurality of oil grooves 2 will not be blocked, so that the oil discharge speed of the oil-containing bearing of the present embodiment is higher than that of the conventional oil-containing bearing.

[0040] See also Figure 2 , in the oil-containing bearing of this embodiment, the two ends of the bearing inner hole 1 are respectively the head end and the tail end;

[0041] The plurality of oil grooves 2 are configured to extend in a direction from the head end to the tail end, and the second contact surface 4 is configured to extend in a direction from the tail end to the head end.

[0042] In this embodiment, the second contact surface 4 is configured to extend along the direction from the tail end to the head end of the bearing inner hole 1. The purpose is to reduce the cost of the mold for manufacturing the oil-containing bearing of this embodiment. Specifically, it makes the structure of the mold simpler, thereby reducing the manufacturing cost of the oil-containing bearing of this embodiment.

[0043] Preferably, the number of the oil grooves 2 is N, where N is an odd number greater than 3. Specifically, according to the size of the oil-containing bearing, the number of oil grooves 2 provided in a relatively small oil-containing bearing is relatively small, and the number of oil grooves 2 provided in a relatively large oil-containing bearing is relatively large; the oil-containing bearings are arranged from small to large in size, and then the number of oil grooves of the oil-containing bearing can be specifically set to an odd number of 3, 5, 7, 9 or more.

[0044] Preferably, in the oil-containing bearing of this embodiment, along the axial direction of the bearing inner hole 1 , the length of the second contact surface 4 is limited to a length between one quarter and one half of the length of the bearing inner hole 1 .

[0045] It should be understood that, in this embodiment, the maximum ratio of the length of the second contact surface 4 to the length of the bearing inner hole 1 is one-half, and the minimum ratio of the length of the second contact surface 4 to the length of the bearing inner hole 1 is one-quarter, so the ratio of the length of the second contact surface 4 to the length of the bearing inner hole 1 is limited to between one-quarter and one-half.

[0046] It should be understood that in other embodiments, the ratio of the length of the second contact surface 4 to the length of the bearing inner hole 1 can be configured to be less than one quarter, for example: one fifth; or, the ratio of the length of the second contact surface 4 to the length of the bearing inner hole 1 can be configured to be greater than one half, for example: three quarters.

[0047] In the prior art (named as an oil-containing bearing, patent document with application number 201620077458.1), when the armature shaft is inserted into the hole cavity of the above-mentioned prior art oil-containing bearing and the armature shaft rotates relative to the oil-containing bearing, since the circumferential surface of the armature shaft has irregular protrusions D1 at the microscopic level, the irregular protrusions D1 collide with the edge of the first zone during the process of rotating from the second zone to the first zone, so that the rotating pair formed by the above-mentioned prior art oil-containing bearing and the armature shaft has relatively large noise.

[0048] From a microscopic perspective, the irregular protrusions D1 on the armature shaft are formed due to limitations of the processing technology. For example, the circumferential surface of the armature shaft is processed using a centerless grinder, thereby forming irregular protrusions D1 on the circumferential surface. As far as the current level of machining technology is concerned, there is no way to directly eliminate the irregular protrusions D1 on the armature shaft, and thus it is impossible to directly reduce the noise of the rotating pair formed by the oil-containing bearing and the armature shaft in the above-mentioned prior art.

[0049] See also Figure 4 , Figure 4The irregular protrusions D1 of the armature shaft are shown in the figure, wherein the first irregular protrusion D1 is shown at the position of 60° of the angular coordinate, the second irregular protrusion D1 is shown at the position between 180° and 210° of the angular coordinate, and the third irregular protrusion D1 is shown at the position between 300° and 330° of the angular coordinate; for each rotation of the armature shaft relative to the oil-containing bearing of the prior art, the three irregular protrusions D1 collide with the edges of the first zone respectively. If the number of first zones of the oil-containing bearing of the prior art is configured as 3, then for each rotation of the armature shaft, the three irregular protrusions D1 of the armature shaft collide with the edges of the three first zones of the prior art 9 times. If the number of first zones of the oil-containing bearing of the prior art is configured as 6, then for each rotation of the armature shaft, the three irregular protrusions D1 of the armature shaft collide with the edges of the six first zones of the prior art 18 times. Thus, the rotating pair formed by the oil-containing bearing of the prior art and the armature shaft has relatively large noise.

[0050] See also Figure 5 , Figure 5 The irregular protrusions D1 of the armature shaft are shown in the figure, the first irregular protrusion D1 is shown at the position of 30° of the angular coordinate, and the second irregular protrusion D1 is shown at the position between 150° and 270° of the angular coordinate; for each rotation of the armature shaft relative to the oil-containing bearing of the prior art, the two irregular protrusions D1 collide with the edges of the first zone respectively, if the number of first zones of the oil-containing bearing of the prior art is configured as 4, then for each rotation of the armature shaft, the two irregular protrusions D1 of the armature shaft collide with the edges of the four first zones of the prior art 8 times, if the number of first zones of the oil-containing bearing of the prior art is configured as 5, then for each rotation of the armature shaft, the two irregular protrusions D1 of the armature shaft collide with the edges of the five first zones of the prior art 10 times, so that the rotating pair formed by the above-mentioned oil-containing bearing of the prior art and the armature shaft has relatively large noise. In this embodiment, from another perspective, that is, from the perspective of improving the structure of the above-mentioned prior art oil-containing bearing, the purpose of reducing the noise of the rotating pair formed by the above-mentioned prior art oil-containing bearing and the armature shaft is achieved.

[0051] Specifically, the oil-containing bearing in this embodiment has the following macroscopic structural differences compared with the oil-containing bearing in the above-mentioned prior art: the second contact surface 4; from a macroscopic perspective, when the armature shaft is arranged in the bearing inner hole 1 of the oil-containing bearing in this embodiment, the circumferential surface of the armature shaft forms surface-to-surface contact with the first contact surface 3 and the second contact surface 4 respectively; from a microscopic perspective, a portion of the armature shaft in contact with the first contact surface 3 is defined as a first-section armature shaft, and a portion of the armature shaft in contact with the second contact surface 4 is defined as a second-section armature shaft, and the surfaces of the first-section armature shaft and the second-section armature shaft respectively have irregular protrusions D1; ​​from the perspective of the second contact surface 4, in the process of the armature shaft rotating relative to the oil-containing bearing in this embodiment, the irregular protrusions D1 of the second-section armature shaft and the second contact surface 4 are always in contact with each other, and correspondingly, the irregular protrusions D1 of the first-section armature shaft are in periodic contact with any one of the first contact surfaces 3.

[0052] The applicant provides specific experimental data of the oil-containing bearing and the armature shaft of the present embodiment, which is used to prove that the noise of the rotating pair formed by the oil-containing bearing and the armature shaft of the present embodiment is lower than the noise of the rotating pair formed by the oil-containing bearing and the armature shaft in the above-mentioned prior art;

[0053] The experimental data provided by the applicant are the data of the vibration acceleration of the rotating pair of the oil-containing bearing and the armature shaft of the present embodiment (defined as vibration data), and the data of the vibration acceleration of the rotating pair of the oil-containing bearing and the armature shaft in the above-mentioned prior art (defined as reference data). The specific experimental equipment and experimental method for detecting vibration acceleration are common knowledge known to those skilled in the art, and will not be repeated here.

[0054] The experimental data provided by the applicant are the oil-containing bearing in this embodiment and the armature shaft matched with the oil-containing bearing; among them, see Figure 6 The oil-containing bearing is provided with five oil grooves 2, five first contact surfaces 3 and one second contact surface 4, the second contact surface 4 is configured in a circular ring shape; and the armature shaft has three irregular protrusions D1 (see Figure 6 );

[0055] The above vibration data are as follows:

[0056] See Table 1, which shows that the rotation speed of the armature shaft relative to the oil-containing bearing of this embodiment is recorded starting from 540 rpm, and the vibration values ​​in three directions (X axis / Y axis / Z axis) between 790 rpm and 1190 rpm are intercepted, wherein the RSS vibration value is: the total value of the vibration synthesis in the three directions (X axis / Y axis / Z axis):

[0057] It should be understood that the formula for calculating the vibration value of RSS by converting the vibration values ​​in three directions (X-axis / Y-axis / Z-axis) is common knowledge known to those skilled in the art and will not be elaborated here.

[0058] Table 1:

[0059] Speed X+this embodiment Y+This embodiment Z+This embodiment RSS+This Example 790 0.003041497 0.001307889 0.004555042 0.005631136 800 0.003554834 0.001523174 0.006395259 0.007473703 810 0.004110443 0.002129273 0.006379402 0.007882025 820 0.006019492 0.002666071 0.007686558 0.010120543 830 0.005145247 0.002141607 0.008374132 0.010059132 840 0.004423664 0.002072916 0.006491275 0.008124189 850 0.006756833 0.002280139 0.005424626 0.008959933 860 0.007202495 0.002705262 0.009151036 0.011955578 870 0.007835905 0.002737573 0.007862692 0.011433181 880 0.012616251 0.004523447 0.0081825 0.015703015 890 0.010711021 0.003561552 0.00864104 0.014215421 900 0.011953287 0.003283014 0.007343311 0.014407757 910 0.021711148 0.005870025 0.009485029 0.024408952 920 0.023500506 0.00680503 0.008376851 0.025860275 930 0.017900212 0.005941353 0.010335905 0.021506934 940 0.019710789 0.005891953 0.006694469 0.021634375 950 0.022612793 0.006672156 0.005990199 0.024325677 960 0.017873179 0.005582568 0.010383449 0.021411016 970 0.017916258 0.004749982 0.007656239 0.020054243 980 0.015557224 0.005432973 0.008665602 0.018618192 990 0.014509566 0.004183435 0.006864104 0.016587482 1000 0.011048803 0.003813217 0.009940048 0.015343442 1010 0.006992208 0.00175835 0.008630875 0.0112461 1020 0.009173907 0.002891249 0.006255442 0.011473903 1030 0.009468684 0.003224729 0.0098353 0.014028114 1040 0.013265156 0.005401954 0.009880103 0.017400055 1050 0.00990026 0.003548935 0.008627671 0.01360319 1060 0.006610301 0.002398054 0.007875287 0.010557788 1070 0.006030512 0.00187711 0.010497448 0.012251001 1080 0.011833869 0.006326907 0.004210492 0.014064084 1090 0.014733335 0.00684384 0.011285483 0.019780582 1100 0.011080301 0.005554403 0.011675299 0.017027539 1110 0.006704451 0.004076072 0.008367574 0.011470847 1120 0.00513038 0.002078078 0.008305152 0.009980719 1130 0.0032528 0.001830215 0.0085978 0.009372969 1140 0.001085187 0.000698565 0.013055603 0.013119238 1150 0.008033447 0.005696013 0.013937455 0.017065564 1160 0.00563876 0.005002579 0.010010757 0.012531428 1170 0.00153847 0.002166785 0.010603705 0.010931625 1180 0.001040493 0.001718407 0.011052135 0.011233221 1190 0.002948387 0.003309126 0.015598343 0.016215782

[0060] See Table 2, which shows that the rotation speed of the armature shaft relative to the oil-containing bearing of this embodiment is recorded starting from 540 rpm, and the vibration values ​​in three directions (X axis / Y axis / Z axis) between 1290 rpm and 1690 rpm are intercepted, wherein the RSS vibration value is: The total value of the vibration synthesis in the three directions (X axis / Y axis / Z axis):

[0061] Table 2:

[0062] Speed X+this embodiment Y+This embodiment Z+This embodiment RSS+This Example 1290 0.000632025 0.001185556 0.008123617 0.008233963 1300 0.000820928 0.002641815 0.015292113 0.015540329 1310 0.000795376 0.002354441 0.015229219 0.015430655 1320 0.001765417 0.001642615 0.014406723 0.01460714 1330 0.000889839 0.000941139 0.012481305 0.012548328 1340 0.000670663 0.001643109 0.012721392 0.012844587 1350 0.001505834 0.002039364 0.016522489 0.016715837 1360 0.001327696 0.001370108 0.016286442 0.01639781 1370 0.002428151 0.000889892 0.01459103 0.014818434 1380 0.001041633 0.001544568 0.016602948 0.016707142 1390 0.002686056 0.003097138 0.019823861 0.020243335 1400 0.000746502 0.001669229 0.015005806 0.015116806 1410 0.002486563 0.001853023 0.013277319 0.013634658 1420 0.001795616 0.002600506 0.017957371 0.018233322 1430 0.001492806 0.001102103 0.011240402 0.01139253 1440 0.003848766 0.001151366 0.01721061 0.01767325 1450 0.001162693 0.001389238 0.017438365 0.017532211 1460 0.001983791 0.001981761 0.016834537 0.017066471 1470 0.002965171 0.001760888 0.015179343 0.015566163 1480 0.002392516 0.001760023 0.017590052 0.017839051 1490 0.003265188 0.001288613 0.01884356 0.019167726 1500 0.001424654 0.001403474 0.019032877 0.019137654 1510 0.004200727 0.00283477 0.018736027 0.019409295 1520 0.002332261 0.001847632 0.019815886 0.020038026 1530 0.002120457 0.003249374 0.019933351 0.020307468 1540 0.001981765 0.001039747 0.015951555 0.01610778 1550 0.006627009 0.00241416 0.021791751 0.022904712 1560 0.002664469 0.002839054 0.022377153 0.022713357 1570 0.002563737 0.002347744 0.020526804 0.020819086 1580 0.002729597 0.001494574 0.011459908 0.011874929 1590 0.002848495 0.001506563 0.01088128 0.011348387 1600 0.002817562 0.001922927 0.013418687 0.013845485 1610 0.003367371 0.001470399 0.014732282 0.015183589 1620 0.002294369 0.001920401 0.010676784 0.011088092 1630 0.002401227 0.003112251 0.005118709 0.006453927 1640 0.003596657 0.001391228 0.01076441 0.011434333 1650 0.002387876 0.000790676 0.014842972 0.015054599 1660 0.003989737 0.004185009 0.001971704 0.006109003 1670 0.00388284 0.002520469 0.010353688 0.011341432 1680 0.001819106 0.001528281 0.0050592 0.005589302 1690 0.002923737 0.003357603 0.008022049 0.009174694

[0063] See Table 3, which shows that the rotation speed of the armature shaft relative to the oil-containing bearing of this embodiment is recorded starting from 540 rpm, and the vibration values ​​in three directions (X axis / Y axis / Z axis) between 1700 rpm and 2050 rpm are intercepted, wherein the RSS vibration value is: the total value of the vibration synthesis in the three directions (X axis / Y axis / Z axis):

[0064] Table 3:

[0065] Speed X+this embodiment Y+This embodiment Z+This embodiment RSS+This Example 1700 0.004093458 0.002817639 0.004173044 0.006489205 1710 0.003863854 0.002112874 0.009207308 0.010206279 1720 0.004529788 0.004455987 0.012268759 0.013816557 1730 0.003979005 0.002890126 0.008445651 0.009773143 1740 0.004001393 0.003096282 0.007642851 0.009165767 1750 0.003360744 0.002147711 0.007051149 0.008100986 1760 0.00189467 0.001980269 0.010091087 0.010456638 1770 0.006970649 0.00819841 0.003000782 0.011171775 1780 0.002879112 0.004855035 0.000117773 0.005645753 1790 0.000580221 0.002201378 0.008135418 0.008447944 1800 0.002591778 0.003719203 0.01039993 0.011344969 1810 0.000984782 0.001327906 0.004773229 0.00505142 1820 0.000667215 0.001230502 0.001903873 0.002363058 1830 0.002847376 0.005918548 0.003703048 0.007539849 1840 0.003772401 0.00641132 0.003314217 0.008143713 1850 0.002997691 0.006606151 0.004033315 0.008300301 1860 0.006165616 0.008022492 0.004236089 0.010969031 1870 0.010185094 0.010310857 0.011525929 0.018517476 1880 0.009919857 0.010114072 0.015241358 0.02080858 1890 0.004448092 0.003490299 0.006890907 0.008913602 1900 0.00898183 0.008005181 0.004820254 0.012961136 1910 0.002299019 0.005674096 0.003028317 0.006830195 1920 0.009204966 0.009928118 0.015772717 0.020786475 1930 0.017433362 0.014621769 0.018104076 0.029077067 1940 0.012778149 0.011995111 0.015170926 0.023180181 1950 0.015447091 0.011945753 0.005992997 0.0204262 1960 0.023916481 0.020366939 0.014518046 0.034606125 1970 0.013243704 0.01111744 0.017929459 0.024909008 1980 0.020587226 0.014855918 0.011953407 0.028060936 1990 0.00707084 0.004294749 0.006513856 0.010529576 2000 0.008734547 0.005387385 0.01072779 0.014845932 2010 0.005954948 0.004739088 0.009323162 0.01203502 2020 0.007690017 0.005077663 0.010677696 0.014104334 2030 0.019388381 0.013039435 0.016507452 0.028608253 2040 0.006336182 0.004617979 0.011234296 0.01369972 2050 0.015138432 0.011499934 0.007056903 0.020278572

[0066] See Table 4, which shows that the rotation speed of the armature shaft relative to the oil-containing bearing of this embodiment is recorded starting from 540 rpm, and the vibration values ​​in three directions (X axis / Y axis / Z axis) between 2050 rpm and 2400 rpm are intercepted, wherein the RSS vibration value is: The total value of the vibration synthesis in the three directions (X axis / Y axis / Z axis):

[0067] Table 4:

[0068] Speed X+this embodiment Y+This embodiment Z+This embodiment RSS+This Example 2050 0.015138432 0.011499934 0.007056903 0.020278572 2060 0.021438744 0.016374491 0.009422474 0.028574932 2070 0.008858301 0.006020784 0.00724255 0.012929573 2080 0.004055426 0.002353268 0.012330194 0.01319159 2090 0.008130744 0.008360761 0.010570679 0.015740095 2100 0.012686273 0.009100134 0.009338025 0.018192105 2110 0.005922287 0.003831428 0.004828578 0.008548011 2120 0.010516138 0.006548531 0.009085609 0.015362965 2130 0.018206006 0.012573211 0.016208891 0.027427585 2140 0.008818656 0.007194951 0.006002591 0.012867289 2150 0.02419755 0.015624472 0.012509476 0.031402748 2160 0.005975205 0.004926251 0.008771759 0.011701059 2170 0.024209572 0.01824221 0.008553594 0.031496755 2180 0.012098977 0.007627761 0.010881458 0.017971481 2190 0.010687744 0.007218863 0.005318865 0.013950992 2200 0.005714882 0.004031234 0.006346127 0.009443731 2210 0.013831452 0.011132215 0.011678013 0.021251148 2220 0.006194548 0.005475165 0.008600632 0.011929825 2230 0.007218111 0.003781456 0.013216961 0.015527028 2240 0.017432479 0.011021891 0.008265477 0.02221917 2250 0.022066046 0.012187496 0.015444252 0.029562989 2260 0.013905113 0.008333343 0.005679374 0.017177079 2270 0.015056087 0.009771838 0.014216959 0.022897522 2280 0.012519455 0.006277973 0.013058532 0.019148758 2290 0.021374799 0.012296735 0.015481089 0.029116248 2300 0.032813519 0.01887992 0.015905986 0.041063108 2310 0.019485449 0.011936412 0.016892783 0.028417016 2320 0.017965959 0.010940466 0.019090999 0.028406614 2330 0.019818284 0.009973706 0.011979429 0.025214002 2340 0.004297214 0.004313827 0.007302685 0.00950812 2350 0.015036335 0.007865519 0.009839791 0.019615791 2360 0.015898723 0.009368455 0.012395723 0.022230414 2370 0.020082299 0.011478884 0.010784253 0.025521826 2380 0.020732841 0.011443301 0.01202176 0.026557909 2390 0.00758205 0.005423392 0.008828036 0.012838803 2400 0.024115091 0.015467324 0.009570394 0.030205433

[0069] See Table 5, which shows that the rotation speed of the armature shaft relative to the oil-containing bearing of this embodiment is recorded starting from 540 rpm, and the vibration values ​​in three directions (X axis / Y axis / Z axis) between 2400 rpm and 2900 rpm are intercepted, wherein the RSS vibration value is: the total value of the vibration synthesis in the three directions (X axis / Y axis / Z axis):

[0070] Table 5:

[0071] Speed X+this embodiment Y+This embodiment Z+This embodiment RSS+This Example 2400 0.024115091 0.015467324 0.009570394 0.030205433 2410 0.01700577 0.012340383 0.005872082 0.021816567 2420 0.027578993 0.01848021 0.007953331 0.034137581 2430 0.006762737 0.006163337 0.015337635 0.017859574 2440 0.018241733 0.012431534 0.006950919 0.023143447 2450 0.013392016 0.011700696 0.013380898 0.022255355 2460 0.011777573 0.008416598 0.010820826 0.018073202 2470 0.015270372 0.011196369 0.009649846 0.021252352 2480 0.002418019 0.003050925 0.012596116 0.013183971 2490 0.011090683 0.005612912 0.008294852 0.014943647 2500 0.007105412 0.002968422 0.012242587 0.014463034 2510 0.010815934 0.003672259 0.015419821 0.019189602 2520 0.010437926 0.003959052 0.007130789 0.013246605 2530 0.004396591 0.00155429 0.011157641 0.012092923 2540 0.003906525 0.001459023 0.008893192 0.009822349 2550 0.009309341 0.003925373 0.009607987 0.013942231 2560 0.006635032 0.000640588 0.009537272 0.011635874 2570 0.005194753 0.002371895 0.015038066 0.016085856 2580 0.004782938 0.000776924 0.007034104 0.008541589 2590 0.005315442 0.001285175 0.009277041 0.010768895 2600 0.005514411 0.002357088 0.010037513 0.011692573 2610 0.000767828 0.002162344 0.00374179 0.004389337 2620 0.00253016 0.002241568 0.00937392 0.009964774 2630 0.00944372 0.003694308 0.005037738 0.01132301 2640 0.00618816 0.001556832 0.009454006 0.011405932 2650 0.005808421 0.002357622 0.00712151 0.009487468 2660 0.001107344 0.001651547 0.009452454 0.009659332 2670 0.003244907 0.001506682 0.008196695 0.008943451 2680 0.003983621 0.000607904 0.007346401 0.008379045 2690 0.005235924 0.000905367 0.003997935 0.006649667 2700 0.005084326 0.000982895 0.00771999 0.00929595 2710 0.001458411 0.000467667 0.006956932 0.007123523 2720 0.003184358 0.001324827 0.009228111 0.009851565 2730 0.001680003 0.002084418 0.006438984 0.006973358 2740 0.004769173 0.001076716 0.009068284 0.010302335 2750 0.005553776 0.001479635 0.007822272 0.009706786 2760 0.003815244 0.000675449 0.005435275 0.006674918 2770 0.000872443 0.000682064 0.004405588 0.00454264 2780 0.003898543 0.001197672 0.004407368 0.006004827 2790 0.007049274 0.003294732 0.007885352 0.01107819 2800 0.002827815 0.000925038 0.00358824 0.004661298 2810 0.004775496 0.001128549 0.006300504 0.007985946 2820 0.006025468 0.001062792 0.004912076 0.007846291 2830 0.002024238 0.00356049 0.005099772 0.006540819 2840 0.002753445 0.002481869 0.005280411 0.006451656 2850 0.007514698 0.001661655 0.005932778 0.009717491 2860 0.00260072 0.001057851 0.004426294 0.005241648 2870 0.004856363 0.000879561 0.004902909 0.006956753 2880 0.0098268 0.002321866 0.003560787 0.010706832 2890 0.002055597 0.000542869 0.003779134 0.004336132 2900 0.001099828 0.000536997 0.00349147 0.003699777

[0072] The above reference data are as follows:

[0073] See Table 6, which shows that the rotation speed of the armature shaft relative to the oil-containing bearing of the prior art is recorded from 540 rpm, and the vibration values ​​in three directions (X axis / Y axis / Z axis) between 790 rpm and 1190 rpm are intercepted, where RSS is: the total value of the vibration synthesis in the three directions (X axis / Y axis / Z axis):

[0074] Table 6:

[0075] Speed X+Existing Technology Y+ Prior Art Z+ Prior Art RSS+Existing Technology 790 0.002063297 0.001717223 0.01876229 0.018953353 800 0.002594683 0.00019362 0.019694244 0.019865375 810 0.002030295 0.000509396 0.019797668 0.019908019 820 0.001830601 9.11987E-05 0.01662772 0.016728433 830 0.002302514 0.000817709 0.019998608 0.020147321 840 0.002758531 0.001302001 0.018783603 0.019029673 850 0.002122669 0.001367038 0.01682093 0.017009356 860 0.002499407 0.00143131 0.019694963 0.019904454 870 0.002256833 0.002252298 0.017894598 0.018176434 880 0.003475107 0.003152537 0.017424822 0.018045478 890 0.003705707 0.003513154 0.018791815 0.019473234 900 0.002430874 0.002379087 0.014859289 0.015243611 910 0.003081029 0.003387521 0.018303834 0.018867919 920 0.004637825 0.004907903 0.016639028 0.017957009 930 0.005469827 0.006138942 0.018765084 0.020487411 940 0.007281085 0.008306631 0.02084133 0.02358761 950 0.0092628 0.011018953 0.02780357 0.031309029 960 0.012204619 0.014454064 0.026549254 0.032599625 970 0.015488475 0.018421477 0.028085111 0.036986715 980 0.016269594 0.019966202 0.031436898 0.04064022 990 0.02023959 0.024743248 0.031873666 0.045141997 1000 0.03330157 0.038685981 0.049534287 0.071128372 1010 0.023006866 0.028729614 0.034457754 0.050418681 1020 0.023756515 0.029870465 0.039305858 0.054786561 1030 0.020259717 0.026121391 0.03388137 0.047336354 1040 0.018142505 0.022910681 0.024258703 0.037980711 1050 0.015393894 0.019296473 0.021417668 0.032680917 1060 0.014520586 0.018241709 0.016197653 0.028389635 1070 0.014203475 0.017859064 0.015628526 0.027657471 1080 0.012351602 0.015301961 0.012927346 0.023533558 1090 0.010413288 0.01275453 0.012296375 0.020550315 1100 0.007433553 0.008648346 0.010652594 0.015605427 1110 0.0065313 0.007659572 0.010288775 0.01439395 1120 0.005344956 0.005933209 0.010927864 0.013534761 1130 0.005673208 0.006042358 0.006900865 0.010785051 1140 0.004094289 0.004018988 0.009547838 0.011138971 1150 0.00261021 0.002587522 0.009313557 0.010012533 1160 0.003278406 0.002976696 0.010124348 0.011050389 1170 0.002765915 0.00210434 0.012040984 0.012532511 1180 0.001961021 0.000906822 0.012741491 0.012923371 1190 0.002243376 0.001236057 0.011827387 0.012101556

[0076] See Table 7, which shows that the rotation speed of the armature shaft relative to the oil-containing bearing of the prior art is recorded starting from 540 rpm, and the vibration values ​​in three directions (X axis / Y axis / Z axis) between 1290 rpm and 1690 rpm are intercepted, where RSS is: the total value of the vibration synthesis in the three directions (X axis / Y axis / Z axis):

[0077] Table 7:

[0078] Speed X+Existing Technology Y+ Prior Art Z+ Prior Art RSS+Existing Technology 1290 0.002197716 0.004194591 0.016147524 0.016827569 1300 0.001877684 0.002447225 0.013849149 0.014188501 1310 0.002439054 0.003547619 0.016169244 0.016732574 1320 0.001699603 0.003905473 0.015419217 0.015996675 1330 0.001127911 0.003352884 0.013451995 0.013909356 1340 0.001306129 0.004328076 0.014435669 0.015127021 1350 0.004494872 0.006309751 0.017262345 0.018921031 1360 0.001826355 0.004714018 0.014923944 0.015756955 1370 0.003379002 0.004541912 0.01093715 0.01231535 1380 0.003071828 0.004570615 0.015344756 0.016303011 1390 0.003105483 0.005751223 0.016972858 0.018187867 1400 0.001514286 0.00512775 0.015622617 0.016512209 1410 0.002406279 0.006650355 0.016858755 0.018282095 1420 0.001680862 0.006662542 0.01577691 0.017208302 1430 0.002266823 0.007644419 0.017563568 0.019288716 1440 0.002715877 0.006929179 0.01763685 0.019142832 1450 0.002775099 0.006538368 0.015381932 0.016942706 1460 0.002300665 0.007266784 0.015545914 0.017314001 1470 0.003171872 0.008840562 0.017434359 0.019803363 1480 0.003150716 0.010106058 0.018072946 0.020944947 1490 0.003253971 0.010447169 0.017197581 0.020383534 1500 0.011597252 0.018132538 0.024617182 0.032700012 1510 0.004592831 0.013619691 0.019126043 0.02392479 1520 0.004686516 0.015504406 0.020239104 0.02592241 1530 0.004507873 0.016191777 0.019058632 0.025411139 1540 0.005208154 0.019091619 0.019594237 0.027848679 1550 0.005576594 0.02152426 0.020225946 0.030057962 1560 0.005173377 0.021391191 0.017337162 0.028016496 1570 0.00432816 0.02035689 0.015328941 0.02584787 1580 0.004597874 0.021643242 0.01548209 0.027004916 1590 0.003123248 0.019029565 0.012936946 0.023221619 1600 0.003408549 0.019949548 0.01276165 0.023926186 1610 0.003732605 0.019545058 0.012236591 0.023359705 1620 0.00431783 0.017854055 0.01263315 0.022293664 1630 0.001049695 0.015374021 0.013702315 0.020620762 1640 0.003911744 0.018933449 0.014428493 0.024123819 1650 0.004658449 0.021045301 0.014460259 0.025955827 1660 0.003907959 0.016893188 0.013519716 0.021987148 1670 0.003291585 0.013939627 0.014015453 0.020039478 1680 0.004140154 0.012491183 0.013660551 0.018967899 1690 0.004011737 0.011140431 0.016325036 0.020167053

[0079] See Table 8, which shows that the rotation speed of the armature shaft relative to the oil-containing bearing of the prior art is recorded from 540 rpm, and the vibration values ​​in three directions (X axis / Y axis / Z axis) between 1700 rpm and 2050 rpm are intercepted, where RSS is: the total value of the vibration synthesis in the three directions (X axis / Y axis / Z axis):

[0080] Table 8:

[0081] Speed X+Existing Technology Y+ Prior Art Z+ Prior Art RSS+Existing Technology 1700 0.00530364 0.007596199 0.014173204 0.016932529 1710 0.006062594 0.009568272 0.017142037 0.020546443 1720 0.005892541 0.011610965 0.0198409 0.02373179 1730 0.006140276 0.01096373 0.01798613 0.021940994 1740 0.006972822 0.011905661 0.018909281 0.023407817 1750 0.007244355 0.010672232 0.022212524 0.025686055 1760 0.00959574 0.012734237 0.018270992 0.024250117 1770 0.011472765 0.014683055 0.018819613 0.02648385 1780 0.011403773 0.014557281 0.017623246 0.025544848 1790 0.012723173 0.014291707 0.017075907 0.025646026 1800 0.014100603 0.01433171 0.014237595 0.024636031 1810 0.014098072 0.014173003 0.016289834 0.025787368 1820 0.01500612 0.011679882 0.012841874 0.022945959 1830 0.015956145 0.011772433 0.014676908 0.024669827 1840 0.019848289 0.011363544 0.014997067 0.027349529 1850 0.024850341 0.011984504 0.015494958 0.031642716 1860 0.02984938 0.012816421 0.017426163 0.036863495 1870 0.033070523 0.017368982 0.015728911 0.040530725 1880 0.039178565 0.017747205 0.014167224 0.045283921 1890 0.042917237 0.012447806 0.015023402 0.047143819 1900 0.047244657 0.014355394 0.013318056 0.051142014 1910 0.048554812 0.014222476 0.013644199 0.052402411 1920 0.045222428 0.013255396 0.014121835 0.049195525 1930 0.043160092 0.013657851 0.014082892 0.047409475 1940 0.036066387 0.012607693 0.013992331 0.040688125 1950 0.038228113 0.014781781 0.01505538 0.043664106 1960 0.039891269 0.014298264 0.020467998 0.047060521 1970 0.036895573 0.013911199 0.020554684 0.044466839 1980 0.033735275 0.012244232 0.020030249 0.041099889 1990 0.03297548 0.012615954 0.023518912 0.04242268 2000 0.030349029 0.011292061 0.023842668 0.040212523 2010 0.028217144 0.011039815 0.023206694 0.038165893 2020 0.026483618 0.010680618 0.024584426 0.037680918 2030 0.022782618 0.00964766 0.023698883 0.034260212 2040 0.026091084 0.010130674 0.027472356 0.039218689 2050 0.026459955 0.010330711 0.028450374 0.040202942

[0082] See Table 9, which shows that the rotation speed of the armature shaft relative to the oil-containing bearing of the prior art is recorded from 540 rpm, and the vibration values ​​in three directions (X axis / Y axis / Z axis) between 2050 rpm and 2400 rpm are intercepted, where RSS is: the total value of the vibration synthesis in the three directions (X axis / Y axis / Z axis):

[0083] Table 9:

[0084] Speed X+Existing Technology Y+ Prior Art Z+ Prior Art RSS+Existing Technology 2050 0.026459955 0.010330711 0.028450374 0.040202942 2060 0.026935071 0.010474525 0.03049783 0.042015847 2070 0.027506974 0.010871409 0.032239385 0.043751561 2080 0.027144101 0.010347067 0.032748912 0.043776194 2090 0.027474729 0.010288239 0.031797685 0.04326432 2100 0.028750312 0.011996279 0.036766827 0.048190152 2110 0.025849927 0.009298501 0.032248385 0.042363182 2120 0.031266209 0.008246292 0.032924812 0.04614781 2130 0.028404718 0.007802254 0.036941182 0.047247795 2140 0.033673111 0.011127453 0.043780085 0.056341765 2150 0.032574262 0.010581583 0.041293886 0.053649207 2160 0.03435903 0.012567933 0.046673339 0.059303427 2170 0.032211408 0.011734554 0.044883326 0.056478204 2180 0.03748399 0.013322833 0.049821962 0.06375559 2190 0.038956739 0.013584612 0.0500089 0.064831006 2200 0.037775744 0.014529563 0.052343756 0.066166334 2210 0.040105116 0.015510557 0.054209732 0.069193155 2220 0.042064734 0.016348053 0.057417754 0.07303081 2230 0.039902095 0.01762492 0.056463111 0.071350528 2240 0.036938723 0.016646354 0.053242091 0.066905087 2250 0.04511717 0.021576542 0.05708712 0.075894963 2260 0.038528271 0.018782752 0.057513073 0.071728467 2270 0.03521302 0.017345585 0.053470429 0.066331839 2280 0.035151701 0.017426012 0.053735431 0.066534236 2290 0.030463593 0.016249245 0.048506338 0.059539343 2300 0.027821092 0.013931717 0.040423296 0.051011261 2310 0.025417946 0.013425115 0.037698731 0.047407806 2320 0.023975523 0.012319265 0.035360191 0.044462716 2330 0.023236286 0.011136082 0.033873945 0.042560328 2340 0.018818911 0.009291871 0.027305407 0.034439448 2350 0.017955245 0.008668631 0.025809562 0.032613946 2360 0.01745685 0.008513785 0.025411556 0.031983954 2370 0.014978528 0.006698045 0.025025219 0.0299246 2380 0.016131287 0.008416104 0.022029633 0.028571909 2390 0.01354125 0.006294301 0.020396007 0.025278069 2400 0.015765687 0.006697034 0.02537802 0.030617823

[0085] See Table 10, which shows that the rotation speed of the armature shaft relative to the oil-containing bearing of the prior art is recorded from 540 rpm, and the vibration values ​​in three directions (X axis / Y axis / Z axis) between 2400 rpm and 2900 rpm are intercepted, where RSS is: the total value of the vibration synthesis in the three directions (X axis / Y axis / Z axis):

[0086] Table 10:

[0087] Speed X+Existing Technology Y+ Prior Art Z+ Prior Art RSS+Existing Technology 2400 0.015765687 0.006697034 0.02537802 0.030617823 2410 0.010945546 0.007608343 0.024109721 0.02754942 2420 0.0104277 0.008507743 0.025945252 0.029227978 2430 0.009374321 0.00957298 0.029816151 0.032688265 2440 0.008550928 0.011215569 0.034283526 0.037071114 2450 0.005198346 0.011837249 0.035145462 0.03744792 2460 0.005673095 0.01209067 0.035585098 0.038008782 2470 0.004981474 0.011945624 0.035269644 0.037569413 2480 0.005590999 0.012643866 0.037220348 0.039704923 2490 0.002745617 0.012956793 0.038768951 0.040968872 2500 0.009336948 0.018128114 0.032342274 0.038233883 2510 0.003050581 0.012149106 0.03581595 0.037943236 2520 0.002502768 0.012321406 0.03581414 0.037956996 2530 0.002476308 0.012392309 0.037052676 0.039148464 2540 0.002284206 0.013496629 0.03943193 0.041740312 2550 0.001594028 0.014824702 0.03799719 0.040817878 2560 0.001666065 0.014066499 0.041832995 0.044166068 2570 0.002472928 0.013647662 0.039388709 0.041759363 2580 0.001764891 0.013577553 0.041345879 0.04355395 2590 0.000691588 0.013905714 0.0393546 0.041744841 2600 0.00046331 0.013602965 0.039887954 0.042146223 2610 0.002760386 0.014198655 0.042971801 0.0453409 2620 0.002901652 0.013322067 0.035653539 0.038171611 2630 0.008474865 0.016505955 0.037162621 0.041537095 2640 0.006009327 0.014364463 0.039538588 0.042494115 2650 0.002711859 0.012694881 0.037090007 0.039296092 2660 0.006829257 0.012835188 0.034682255 0.037606377 2670 0.007703864 0.012919464 0.035075698 0.038164993 2680 0.006282818 0.012264329 0.034066342 0.036747833 2690 0.003693157 0.011628773 0.031382721 0.0336711 2700 0.004177402 0.010004484 0.030139321 0.032029972 2710 0.009212587 0.012660498 0.031403061 0.035090058 2720 0.012817901 0.012981288 0.032795195 0.037527819 2730 0.014993977 0.012258221 0.030556902 0.036177446 2740 0.014207141 0.012386193 0.030799953 0.036109524 2750 0.009466478 0.008795215 0.031131608 0.03370678 2760 0.012869993 0.011527528 0.025801888 0.031052505 2770 0.018066715 0.01203879 0.028163036 0.035559742 2780 0.013613793 0.010964161 0.025173444 0.030647194 2790 0.016266439 0.011170994 0.025871813 0.032538268 2800 0.01846494 0.011146624 0.026786016 0.034390288 2810 0.016910406 0.009714375 0.025503211 0.032105212 2820 0.016581133 0.010328366 0.025546432 0.032159435 2830 0.014081696 0.010220136 0.024103625 0.029727598 2840 0.012486279 0.00845272 0.023907403 0.028265165 2850 0.013427024 0.009374489 0.024556594 0.029515967 2860 0.011817495 0.009225391 0.024497021 0.028720464 2870 0.011491314 0.015391884 0.0209109 0.028394121 2880 0.004840114 0.016170382 0.017030038 0.023977701 2890 0.012737056 0.008679846 0.025151819 0.029498921 2900 0.011588907 0.007758666 0.025390754 0.028968777

[0088] Please refer to the curve graph drawn by the above vibration data and reference data provided by the applicant. Figure 3 .

[0089] Compare Table 1 with Table 6 and refer to Figure 3 , Figure 3 The A1 part in the figure refers to the vibration curve Z1 drawn by the vibration synthesis total value (RSS+this embodiment) in the three directions of X-axis / Y-axis / Z-axis in Table 1 when the rotation speed is 790-1190, and the vibration curve C1 drawn by the vibration synthesis total value (RSS+existing technology) in the three directions of X-axis / Y-axis / Z-axis in Table 6;

[0090] Comparing the vibration curve Z1 with the reference curve C1, the peak of the vibration curve Z1 is between 0.02g and 0.03g, and the peak of the reference curve C1 is between 0.07g and 0.08g; the trough of the vibration curve Z1 is between 0 and 0.01g, and the trough of the reference curve C1 is between 0 and 0.01g;

[0091] The maximum vibration acceleration of the vibration curve Z1 is 0.03g, and the maximum vibration acceleration of the reference curve C1 is 0.08g; this means that the vibration amplitude of the rotating pair composed of the oil-containing bearing and the armature shaft in the prior art (named as an oil-containing bearing, patent document with application number 201620077458.1) is greater than the vibration amplitude of the rotating pair composed of the oil-containing bearing and the armature shaft in the present embodiment, resulting in the noise of the rotating pair composed of the oil-containing bearing and the armature shaft in the prior art being greater than the noise of the rotating pair composed of the oil-containing bearing and the armature shaft in the present embodiment.

[0092] Similarly, compare Table 2 with Table 7 and refer to Figure 3 , Figure 3 The A2 part in the figure refers to the vibration curve Z2 drawn by the total vibration synthesis value of the three directions of the X axis / Y axis / Z axis (RSS+this embodiment) in Table 2 when the rotation speed is 1290~1690, and the vibration curve C2 drawn by the total vibration synthesis value of the three directions of the X axis / Y axis / Z axis (RSS+existing technology) in Table 7;

[0093] Comparing the vibration curve Z2 with the reference curve C2, the peak of the vibration curve Z2 is between 0.02g and 0.03g, and correspondingly, the peak of the reference curve C2 is between 0.03g and 0.04g; the trough of the vibration curve Z2 is between 0 and 0.01g, and correspondingly, the trough of the reference curve C2 is between 0.01g and 0.02g;

[0094] The maximum vibration acceleration of the vibration curve Z2 is 0.03g, and the maximum vibration acceleration of the reference curve C2 is 0.04g; this means that the vibration amplitude of the rotating pair composed of the oil-containing bearing and the armature shaft in the prior art (named as an oil-containing bearing, patent document with application number 201620077458.1) is greater than the vibration amplitude of the rotating pair composed of the oil-containing bearing and the armature shaft in the present embodiment, resulting in the noise of the rotating pair composed of the oil-containing bearing and the armature shaft in the prior art being greater than the noise of the rotating pair composed of the oil-containing bearing and the armature shaft in the present embodiment.

[0095] Similarly, compare Table 3 with Table 8 and refer to Figure 3 , Figure 3 The A3 part in the figure refers to the vibration curve Z3 drawn by the total vibration synthesis value of the three directions of the X axis / Y axis / Z axis (RSS+this embodiment) in Table 3 when the rotation speed is 1700-2050, and the vibration curve C3 drawn by the total vibration synthesis value of the three directions of the X axis / Y axis / Z axis (RSS+existing technology) in Table 8;

[0096] Comparing the vibration curve Z3 with the reference curve C3, the peak of the vibration curve Z3 is between 0.03g and 0.04g, and the peak of the reference curve C3 is between 0.05g and 0.06g; the trough of the vibration curve Z3 is between 0 and 0.01g, and the trough of the reference curve C3 is between 0.01g and 0.02g;

[0097] The maximum vibration acceleration of the vibration curve Z3 is 0.04g, and the maximum vibration acceleration of the reference curve C3 is 0.06g; this means that the vibration amplitude of the rotating pair composed of the oil-containing bearing and the armature shaft in the prior art (named as an oil-containing bearing, patent document with application number 201620077458.1) is greater than the vibration amplitude of the rotating pair composed of the oil-containing bearing and the armature shaft in the present embodiment, resulting in the noise of the rotating pair composed of the oil-containing bearing and the armature shaft in the prior art being greater than the noise of the rotating pair composed of the oil-containing bearing and the armature shaft in the present embodiment.

[0098] Similarly, compare Table 4 with Table 9 and refer to Figure 3 , Figure 3 The A4 portion in the figure refers to the vibration curve Z4 drawn by the total vibration synthesis value of the three directions of the X axis / Y axis / Z axis (RSS+this embodiment) in Table 4 when the rotation speed is 2050-2400, and the vibration curve C4 drawn by the total vibration synthesis value of the three directions of the X axis / Y axis / Z axis (RSS+existing technology) in Table 9;

[0099] Comparing the vibration curve Z4 with the reference curve C4, the peak of the vibration curve Z4 is between 0.04g and 0.05g, and the peak of the reference curve C4 is between 0.07g and 0.08g; the trough of the vibration curve Z4 is between 0 and 0.01g, and the trough of the reference curve C4 is between 0.02g and 0.03g;

[0100] The maximum vibration acceleration of the vibration curve Z4 is 0.05g, and the maximum vibration acceleration of the reference curve C4 is 0.08g; this means that the vibration amplitude of the rotating pair composed of the oil-containing bearing and the armature shaft in the prior art (named as an oil-containing bearing, patent document with application number 201620077458.1) is greater than the vibration amplitude of the rotating pair composed of the oil-containing bearing and the armature shaft in the present embodiment, resulting in the noise of the rotating pair composed of the oil-containing bearing and the armature shaft in the prior art being greater than the noise of the rotating pair composed of the oil-containing bearing and the armature shaft in the present embodiment.

[0101] Similarly, compare Table 5 with Table 10 and refer to Figure 3 , Figure 3 The A5 part in the figure refers to the vibration curve Z5 drawn by the total vibration synthesis value of the three directions of the X axis / Y axis / Z axis (RSS+this embodiment) in Table 5 when the rotation speed is 2400-2900, and the vibration curve C5 drawn by the total vibration synthesis value of the three directions of the X axis / Y axis / Z axis (RSS+existing technology) in Table 10;

[0102] Comparing the vibration curve Z5 with the reference curve C5, the peak of the vibration curve Z5 is between 0.03g and 0.04g, and the peak of the reference curve C5 is between 0.04g and 0.05g; the trough of the vibration curve Z5 is between 0 and 0.01g, and the trough of the reference curve C5 is between 0.02g and 0.03g;

[0103] The maximum vibration acceleration of the vibration curve Z5 is 0.04g, and the maximum vibration acceleration of the reference curve C5 is 0.05g; this means that the vibration amplitude of the rotating pair composed of the oil-containing bearing and the armature shaft in the prior art (named as an oil-containing bearing, patent document with application number 201620077458.1) is greater than the vibration amplitude of the rotating pair composed of the oil-containing bearing and the armature shaft in the present embodiment, resulting in the noise of the rotating pair composed of the oil-containing bearing and the armature shaft in the prior art being greater than the noise of the rotating pair composed of the oil-containing bearing and the armature shaft in the present embodiment.

[0104] Therefore, the oil-containing bearing of this embodiment solves the technical problem of how to reduce the impact noise of the rotating pair formed by the oil groove depression and the microscopic protrusion of the armature shaft during operation in the prior art by adding a second contact surface, and the second contact surface is coplanar with the first contact surface.

[0105] Embodiment 3:

[0106] In this embodiment, a blower for a vehicle air conditioner is provided, comprising the oil-containing bearing in the aforementioned embodiment 1.

[0107] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. Oil-containing bearing, characterized in that: It includes a bearing inner hole (1) for the shaft to be inserted into; The bearing inner hole (1) is provided with a plurality of oil grooves (2), a first contact surface (3) and a second contact surface (4), wherein, along the circumferential direction of the bearing inner hole (1), there is a first contact surface (3) between any two adjacent oil grooves (2), and along the axial direction of the bearing inner hole (1), all the first contact surfaces (3) intersect with the second contact surfaces (4) respectively; All of the first contact surfaces (3) and the second contact surfaces (4) are coplanar with the same reference cylindrical surface, and along the radial direction of the bearing inner hole (1), any of the oil grooves (2) is recessed into the reference cylindrical surface.

2. The oil-impregnated bearing according to claim 1, characterized in that: The two ends of the bearing inner hole (1) are respectively a head end and a tail end; The plurality of oil grooves (2) are configured to extend along the direction from the head end to the tail end, and the second contact surface (4) is configured to extend along the direction from the tail end to the head end.

3. The oil-impregnated bearing according to claim 1 or 2, characterized in that: The number of the oil grooves (2) is N, wherein N is an odd number greater than or equal to 3.

4. The oil-impregnated bearing according to claim 3, characterized in that: The second contact surface (4) is in the shape of a circular ring.

5. The oil-impregnated bearing according to claim 4, characterized in that: Along the axial direction of the bearing inner hole (1), the length of the second contact surface (4) is limited to a length between one quarter and one half of the length of the bearing inner hole (1).

6. A blower for a vehicle air conditioner, characterized in that: Comprising the oil-containing bearing according to any one of claims 1 to 5.

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